How noisy is your food?

The sounds of eating may reduce how much you eat: New study shows food sound is an important sensory cue -- ScienceDaily
https://www.sciencedaily.com/releases/2016/03/160315131902.htm

There's another experiment with a bottomless bowl of soup that keeps refilling magically from underneath the table, and people eat 50% more soup until they realize what's happening. http://www.ncbi.nlm.nih.gov/m/pubmed/15761167/

Sadly, the lesson is we are so unaware of our satiety and we'll eat ourselves into oblivion without self control.